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New Material using Green Tea Could Fight Cold Sensitivity, Prevent Caries Researchers have developed a new material with green tea extract that could fix the problem of cold sensitivity and also help prevent cavities in susceptible patients. Tooth sensitivity commonly occurs when the protective layers of teeth are worn... away, revealing a bony tissue called dentin. Researchers wanted to tackle sensitivity and beat the bacteria at the same time. They encapsulated nanohydroxyapatite and a green tea polyphenol epigallocatechin-3-gallate (EGCG) in silica nanoparticles, which can stand up to acid and wear and tear. Based on these findings, the researchers say the material could be a good candidate for combating tooth sensitivity and cavities. Learn more about this study at ACS Applied Materials & Interfaces (2017); doi: 10.1021/acsami.7b06597. See more